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Provisions for Legal Claims and Contingent Liabilities (Details) - BRL (R$)
R$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
IfrsStatementLineItems [Line Items]    
Provisions for legal claims, beginning R$ 1,597,365 R$ 1,555,704
Provision for litigations, additions 767,318 272,306
Provision for litigations, reversals (122,873) (78,577)
Construction cost, additions/(rev.) 3,583 8,434
Additions to assets 37,551 49,714
Settlement (242,212) (210,085)
Transfers/others (3,133) (131) [1]
Provisions for legal claims, ending 2,037,599 1,597,365
Tax [Member]    
IfrsStatementLineItems [Line Items]    
Provisions for legal claims, beginning 181,115 173,873
Provision for litigations, additions 38,814 14,169
Provision for litigations, reversals (2,424) (1,417)
Construction cost, additions/(rev.)
Additions to assets
Settlement (9,764) (127)
Transfers/others (5,991) (5,383) [1]
Provisions for legal claims, ending 201,750 181,115
Tax [Member] | Cofins [Member]    
IfrsStatementLineItems [Line Items]    
Provisions for legal claims, beginning 110,059 107,148
Provision for litigations, additions 15,109 4,123
Provision for litigations, reversals (1,604) (1,212)
Construction cost, additions/(rev.)
Additions to assets
Settlement
Transfers/others [1]
Provisions for legal claims, ending 123,564 110,059
Tax [Member] | Others [Member]    
IfrsStatementLineItems [Line Items]    
Provisions for legal claims, beginning 71,056 66,725
Provision for litigations, additions 23,705 10,046
Provision for litigations, reversals (820) (205)
Construction cost, additions/(rev.)
Additions to assets
Settlement (9,764) (127)
Transfers/others (5,991) (5,383) [1]
Provisions for legal claims, ending 78,186 71,056
Labors [Member]    
IfrsStatementLineItems [Line Items]    
Provisions for legal claims, beginning 569,756 596,248
Provision for litigations, additions 108,902 94,845
Provision for litigations, reversals (2,778) (21,647)
Construction cost, additions/(rev.)
Additions to assets
Settlement (139,416) (105,777)
Transfers/others 6,087 [1]
Provisions for legal claims, ending 536,464 569,756
Employee Benefits [Member]    
IfrsStatementLineItems [Line Items]    
Provisions for legal claims, beginning 37,148 52,401
Provision for litigations, additions 13,270 4,685
Provision for litigations, reversals (19,672) (19,623)
Construction cost, additions/(rev.)
Additions to assets
Settlement (620) (761)
Transfers/others 446 [1]
Provisions for legal claims, ending 30,126 37,148
Civil [Member]    
IfrsStatementLineItems [Line Items]    
Provisions for legal claims, beginning 706,191 644,483
Provision for litigations, additions 601,195 137,913
Provision for litigations, reversals (13,888) (29,919)
Construction cost, additions/(rev.) 3,583 8,434
Additions to assets 37,551 49,714
Settlement (76,724) (103,153)
Transfers/others 2,858 (1,281) [1]
Provisions for legal claims, ending 1,260,766 706,191
Civil [Member] | Civil And Administrative Claims [Member]    
IfrsStatementLineItems [Line Items]    
Provisions for legal claims, beginning 433,437 387,895
Provision for litigations, additions 592,796 129,730
Provision for litigations, reversals (3,925) (9,218)
Construction cost, additions/(rev.)
Additions to assets
Settlement (67,055) (74,989)
Transfers/others 2,858 19 [1]
Provisions for legal claims, ending 958,111 433,437
Civil [Member] | Easements [Member]    
IfrsStatementLineItems [Line Items]    
Provisions for legal claims, beginning 138,069 111,553
Provision for litigations, additions 3,594 1,616
Provision for litigations, reversals (90)
Construction cost, additions/(rev.) (722) 15,702
Additions to assets 627 36,771
Settlement (2,754) (27,573)
Transfers/others [1]
Provisions for legal claims, ending 138,724 138,069
Civil [Member] | Expropriations And Property [Member]    
IfrsStatementLineItems [Line Items]    
Provisions for legal claims, beginning 125,028 133,888
Provision for litigations, additions 2,195 680
Provision for litigations, reversals (8,113) (15,031)
Construction cost, additions/(rev.) 4,305 (7,268)
Additions to assets 36,924 12,943
Settlement (5,427) (184)
Transfers/others [1]
Provisions for legal claims, ending 154,912 125,028
Civil [Member] | Customers [Member]    
IfrsStatementLineItems [Line Items]    
Provisions for legal claims, beginning 3,755 3,973
Provision for litigations, additions 2,113 895
Provision for litigations, reversals (630) (706)
Construction cost, additions/(rev.)
Additions to assets
Settlement (1,488) (407)
Transfers/others [1]
Provisions for legal claims, ending 3,750 3,755
Civil [Member] | Environmental [Member]    
IfrsStatementLineItems [Line Items]    
Provisions for legal claims, beginning 5,902 7,174
Provision for litigations, additions 497 4,992
Provision for litigations, reversals (1,130) (4,964)
Construction cost, additions/(rev.)
Additions to assets
Settlement
Transfers/others (1,300) [1]
Provisions for legal claims, ending 5,269 5,902
Regulatory [Member]    
IfrsStatementLineItems [Line Items]    
Provisions for legal claims, beginning 103,155 88,699
Provision for litigations, additions 5,137 20,694
Provision for litigations, reversals (84,111) (5,971)
Construction cost, additions/(rev.)
Additions to assets
Settlement (15,688) (267)
Transfers/others [1]
Provisions for legal claims, ending R$ 8,493 R$ 103,155
[1] Reclassification mainly to Liabilities associated with assets classified as held for sale (Note 39).